EP0845767A1 - Etiquette composite et procédé d'étiquetage de substrats - Google Patents

Etiquette composite et procédé d'étiquetage de substrats Download PDF

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Publication number
EP0845767A1
EP0845767A1 EP97850138A EP97850138A EP0845767A1 EP 0845767 A1 EP0845767 A1 EP 0845767A1 EP 97850138 A EP97850138 A EP 97850138A EP 97850138 A EP97850138 A EP 97850138A EP 0845767 A1 EP0845767 A1 EP 0845767A1
Authority
EP
European Patent Office
Prior art keywords
layer
information
substrate
composite
label
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97850138A
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German (de)
English (en)
Inventor
John R. Pennance
John D. Bennett Iii
William L. Jarvis
Kathleen M. Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flexcon Co Inc
Original Assignee
Flexcon Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flexcon Co Inc filed Critical Flexcon Co Inc
Publication of EP0845767A1 publication Critical patent/EP0845767A1/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
    • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions

Definitions

  • the invention relates to labeling in general, and more specifically to a new and improved label, which when removed from a substrate leaves a marking on the substrate which is an image of the information provided on the label.
  • Authentification labels, or tags have undergone a change over the last 15 years. As the technology for replicating graphics has advanced, so has the need to enhance the authentification technology. Conventional color photocopiers, color printers and computers make the task of replicating authentification labels fairly easy and inexpensive.
  • authentification devices have been used to counteract this trend. These devices utilize holograms, chromic shifting inks, MICROTAGGANTS®, etc. For the most part, these systems have been replicated or at least replicated well enough to pass the inspection of the average trained inspector. An authentification label which uniquely identifies the specific tagged item has long been sought.
  • the current technology relies on the use of a bar code or serial number, or other variable inputs which are printed on the surface of a label.
  • authentification label also be non-transferable (tamper evident) without some detectable, irreversible change.
  • tamper evident labels are described in U.S. Pat. App. Ser. No. 08/479,553 filed June 7, 1995 entitled “Tamper Evident Labeling", incorporated herein by reference.
  • a labeling composite and method of producing same has an information receiving first layer having a top surface onto which information is provided and a bottom surface.
  • An adhesive second layer is provided on the bottom surface which accommodates the adherence of the first layer to a surface of a substrate, the adhesive second layer including substrate marking substance dispersed therein.
  • the marking substance serves to mark the portions of the substrate surface covered by the second layer in a non-uniform manner providing a detectable image of the information upon removal of the composite of the first and second layers from the substrate surface.
  • a method of labeling includes providing an information receiving first layer having a top surface onto which information is provided and a bottom surface.
  • An adhesive second layer is applied on the bottom surface to define a composite label, the second layer accommodating the adherence of the first layer to a surface of a substrate, the second layer including substrate marking substance dispersed therein.
  • the marking substance migrates to the substrate surface to mark the portions of the substrate surface covered by the second layer in a non-uniform manner providing a detectable image of the information upon removal of the composite label from the substrate surface.
  • the composite label is applied to the substrate surface.
  • the top surface of the first layer is physically altered to create the information thereon, the physical alteration of the top surface acting to alter the concentration of the marking substance within the adhesive layer in accordance with the information.
  • the altered concentration of the marking substance results in a differential migration of the substance to the substrate surface and thus the substrate surface is marked with the image of the information.
  • Fig. 1 shows a cross sectional view of an exemplary composite label 10 as provided to an end user.
  • the label is initially configured on a removable release liner 12, which is constructed from any one of many conventionally available label release liners, such as Special 50K-8 liner available from Flexcon Co., Inc. of Spencer, MA.
  • the label 10 includes an information receiving layer or film 14 having a top surface 14a onto which information, such as an image, indicia or other variable input is provided, and a bottom surface 14b.
  • the top layer 14 of the invention includes, but is not limited to, films of polyethylene terephthalate, polyethylene, polypropylene, polystyrene (impact and general purpose), polyacrylic, polyvinyl chloride, various papers (cellulosics), etc.
  • an adhesive layer 16 is provided on the bottom surface 14b for adhering of the label to the surface of a substrate.
  • the adhesive layer 16 includes a substrate marking substance 17 dispersed therein.
  • the substance 17 is shown diagrammatically for illustrative purposes.
  • Within the adhesive layer there is incorporated, for example, dyes or other conventionally known reactive marking systems.
  • the marking substance can either be visible under visible light or require special irradiation to view.
  • the marking substance preferably provides a permanent or indelible mark on the substrate to which it is applied.
  • the marking substance is a monomeric dye that has a relatively low molecular weight, which in turn allows for flowing and migration of the dye through the adhesive layer and penetration into the substrate being labeled.
  • an ultra-violet (UV) fluorescent dye conventionally available as Uvitex® will operate in accordance with the invention with pressure sensitive adhesives such as acrylic pressure sensitive adhesive V-23 available from Flexcon Co., Inc.
  • thicknesses of all of the figures illustrating the invention have been exaggerated for illustrative purposes. In actual embodiments, thicknesses range from about .5 to 7 mils for the information receiving layer, .2 to 8 mils for the adhesive layer, and 1 to 8 mils for the release liner.
  • the label 10 of the invention is shown applied to a substrate 18.
  • the label must be physically altered in some way. An example would be to die cut or punch out the variable information from the label material itself, or to otherwise ablate or deform the surface or the label via impact printing or a directed thermal energy source, such as a laser.
  • information 20 is imparted to the layer 14 by ablating the label with a laser light source.
  • the information such as indicia
  • the ablations 21 to the label function to alter the concentration of the marking substance within the adhesive layer 16 as at 22.
  • the marking substance is forced closer to the substrate surface and evaporated onto the substrate surface 18a.
  • the altered concentration 22 of the marking substance thus results in an enhanced migration of the marking substance to the substrate surface. It will be appreciated by those of skill in the art that the altered concentration 22 of the marking substance replicates an image associated with the information 20 provided to the layer 14. As more marking substance migrates to the substrate surface, the surface is marked with a detectable image 24 of the information.
  • the marking substance serves to mark the portions of the substrate surface covered by the adhesive layer in a non-uniform manner providing the detectable image 24 of the information 20 upon removal of the composite label from said substrate surface as shown in Fig. 3. It will be understood that the entire surface of the substrate which is covered by the adhesive layer 16 will be marked with a "footprint". Thus, for example, the marked area will comprise a lightly shaded footprint 25 outlining the entire adhesive layer and the more vivid image 24 associated with the information 20 caused by the altered concentration 22 of the marking substance.
  • the transferred image 24 (information such as a variable input or indicia) can either be covert, thus requiring a special device to detect, or overt, thus easily detected by visual inspection, or a combination of both.
  • the resulting transferred image can be designed to bond to the substrate surface, or, in those cases in which the substrate has a permeable surface layer, actually have the image penetrate into and below the substrate surface.
  • the footprint is shown as being bonded to the surface 18a of the substrate 18, while the image 24 penetrates within the substrate.
  • the information 20 is provided to the label 10 by physically altering the information receiving layer 14 prior to applying the label to a substrate.
  • the layer 14 is subjected to impact printing (e.g. typewriter) or laser ablation to produce the information 20 thereon.
  • the indentations 26 cause a corresponding alteration of the adhesive layer 16 which results in the alteration of the concentration of the marking substance 17 as at 27. Accordingly, it will be appreciated by those of skill in the art that the altered concentration 27 of the marking substance replicates an image associated with the information 20 provided to the layer 14.
  • the marking substance migrates to the substrate surface, and thus the surface is marked with a detectable image 28,29 of the information.
  • the image 24 and footprint 25 marked in accordance with Figs. 1-3 is shown in Fig. 6 as a solid impression or positive image of the information provided to the label.
  • the image 28,29 and footprint 25 marked in accordance with Figs. 4-5 is shown in Fig. 7 as an outline, halo, or negative image of the information provided to the label.
  • the invention is used for marking automobile parts.
  • a label that has the vehicle identification number (VIN) as the variable input information.
  • VIN vehicle identification number
  • This label cannot be removed without permanent changes to the label (tamper evidence) and must leave some "footprint" of the label on the automobile component.
  • This is accomplished by surface printing the VIN on a conventional tamper-evident labeling system and having a UV fluorescent dye dispersed within the pressure-sensitive adhesive which affixes the label to the automobile component.
  • the UV fluorescent dye migrates to the surface of the substrate.
  • a footprint of the label would be visible under a long wavelength UV (“black”) light. The presence of this footprint means that someone removing the original label would have to more exactly line up a replacement label. While the footprint outlines the adhesive layer contacting the substrate surface, it is desirable to replicate the VIN from the surface of the label to the substrate surface.
  • FIG. 8 A cross sectional view of an exemplary security composite label 30 in accordance with the invention is shown in Fig. 8.
  • the label includes a polyethylene terephthalate (PET) film 31, 1.5 mil thick, is printed with a discontinuous first coating 32 of a material (e.g. cellulostics such as nitrocellulose or ethylcellulose, certain acrylics polymers such as PBA, etc.), which has a low level of adhesion to the film, such that the adhesion strength is less than that to subsequent layers to the substrate.
  • a continuous second coating 33 e.g. amorphous polyester resins such as top coating TC200 as available from Flexcon Co., Inc.
  • top coating TC200 as available from Flexcon Co., Inc.
  • the second coating is micro-embossed as at 34 with a desired holographic image.
  • This process is followed by a metallization process to produce a metallic layer 35 (e.g. aluminum vacuum deposited to a thickness of 50-600°A) over the entire second coating 33.
  • a continuous black coating 36 (carbon black 5-40% by weight) is then dispensed in a polymer with 0.5 - 10% free carboxylation over the metallized layer.
  • a pressure-sensitive adhesive 37 e.g.
  • acrylic pressure sensitive adhesive V-23 available from Flexcon Co., Inc.
  • a long wavelength UV light fluorescent dye 37a such as Uvitex®
  • the entire composite is backed with a siliconized release liner 38, preferably Special 50K-8 liner available from Flexcon Co., Inc.
  • the label is applied to the substrate.
  • the label surface is then ablated with the VIN via a directed radiate energy source, such as a Bassel laser (type YAG or CO 2 laser, 10-18 amps, 1000Hz to continuous, preferably between 2500-5500Hz) at a burn rate of between 5mm/sec to 1400mm/sec, preferably between 25mm/sec-350mm/sec.
  • a directed radiate energy source such as a Bassel laser (type YAG or CO 2 laser, 10-18 amps, 1000Hz to continuous, preferably between 2500-5500Hz) at a burn rate of between 5mm/sec to 1400mm/sec, preferably between 25mm/sec-350mm/sec.
  • the VIN cut into the label surface constitutes an additional tamper-evident or anti-transfer feature, independent from any other tamper-evident or anti-transfer feature, and independent from any other tamper-evident mechanism such as the use of the described low adhesion discontinuous coating.
  • the VIN is ablated in the label before application to the automobile component.
  • the other parts of the chemical matrix. etc. a decreased concentration of the fluorescent dye would result in the area that had been physically altered by impact or ablation.
  • the label is subsequently applied to the substrate, there would be a lower concentration of the dye under the VIN and hence, a negative image of the information is obtained.
  • the substrate surface contains a pH or other chemically sensitive material which would be altered by the migrating marking substance from the label (again, activated by temperature, pressure or removal by die cutting or stamping).
  • the physical alteration of the VIN into the holographic film eventually results in a unique label.
  • the physical distinction of parts of the hologram by the physical alteration process make obtaining a true copy very difficult at best.
  • Another manifestation of the invention is its use as a stencil, i.e. a pre-activated label with indicia accomplished by the methods previously described, applying the label to the substrate, provide time for image transfer to occur, then removal of the label or stencil.
  • the label is preferentially not tamper-evident.
  • a label which is used for marking glass or like materials.
  • a label is provided which has incorporated within the adhesive layer a fluoridating agent such as sulfurhexafluoride (0.1-2% by weight) and a micro-encapsulation of an activating acid such as tartaric acid in the presence of the inorganic or organic fluorine source.
  • the materials are then activated by the methods previously described, e.g. impact or ablation, to form hydrogenfluoride (HF) which will serve as a chemical etchant.
  • HF hydrogenfluoride
  • the label is then applied to a glass surface, such as automobile glass. Following the proper reaction time, based on concentration and ambient conditions, the composite label is removed from the glass.
  • a composite label consisting of a 2.4 mil rigid white PVC film, coated on one side with a pressure-sensitive adhesive, such as adhesive V-200W available from Flexcon Co., Inc., and containing a UV fluorescent dye, such as Uvitex® (0.001 - 3% by weight total adhesive).
  • the adhesive layer consists of an acrylic based coat weight between 0.2 and 5.0 mil depending upon the texture of the substrate.
  • the adhesive layer is covered with a conventional release liner.
  • Information such as identification indicia is provided to the label by stamping out or laser ablation, thus leaving a void within the label structure.
  • the label is applied to the substrate that is being identified.
  • the same labeling composite as in example 3 is used and subjected to a high impact printer.
  • the surface of the information receiving layer is permanently deformed or compressed under the impact.
  • a contrasting image is found after 10 days at ambient conditions upon removal of the label and examination of the substrate with a UV light source.
  • the previously described composite label has an adhesive layer with a marking substance dispersed therein, the marking substance being contained in micro-encapsulants.
  • the marking substance can be any of the previously described substances including pH sensitive dyes or UV fluorescent dyes which are encapsulated in shells of, for example, polymer material (cellulostics, acrylics, styrenics, etc.), which would have specific sensitivities to impact or heat generated around a laser ablation.
  • the micro-encapsulants have their shells impregnated with specific substances such as laser dyes (e.g. Coumarin 6, Oxazine 1 Perchlorate, etc. as available from Kodak Co.), which would preferably absorb laser radiant energy. This effect can be made more specific to a particular frequency, although generally a black coloration would be appropriate as a broad band radiant energy collector.
  • FIG. 9 Another exemplary embodiment of the invention is shown in Fig. 9, and includes a composite label 40 having an information receiving layer 44 with a top surface 44a and a bottom surface 44b, and an adhesive layer 46 which includes a marking substance 46a dispersed therein.
  • the specific layer materials and compositions can vary for this composite as described in accordance with the previous examples.
  • the migration of the marking substance to the substrate 18 is blocked by a selectively coating or printing the adhesive layer with a polymer layer 48.
  • the polymers providing the desired migration blocking effect include acrylics, polymethylmethacrylate, amorphous polyester resins or other barrier polymers such as PVDC, PVC, PVF, etc.
  • the polymer layer serves to slow the resulting marking substance transmission rate to less than the transmission rate through the unobstructed portions of the adhesive layer. Since the marking substance will migrate through the unobstructed portions of the adhesive layer more efficiently, the resulting marking is a negative image of the information provide to the label.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
EP97850138A 1996-10-15 1997-10-15 Etiquette composite et procédé d'étiquetage de substrats Withdrawn EP0845767A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73282196A 1996-10-15 1996-10-15
US732821 1996-10-15

Publications (1)

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EP0845767A1 true EP0845767A1 (fr) 1998-06-03

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EP97850138A Withdrawn EP0845767A1 (fr) 1996-10-15 1997-10-15 Etiquette composite et procédé d'étiquetage de substrats

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000054243A1 (fr) * 1999-03-05 2000-09-14 Daimlerchrysler Ag Feuille adhesive de securite servant d'element d'identification
WO2002035506A1 (fr) * 2000-10-25 2002-05-02 3M Innovative Properties Company Dispositif indicateur de tentative de deterioration
WO2003035411A2 (fr) * 2001-10-25 2003-05-01 Tesa Ag Film de transfert par laser pour etiquetage durable d'elements constitutifs
WO2004021471A1 (fr) * 2002-08-26 2004-03-11 Schreiner Gmbh & Co. Kg Enveloppe pour piles seches, accumulateurs et elements similaires
GB2386234B (en) * 2001-10-03 2005-07-27 Willett Int Ltd Coding of substrates
US7422781B2 (en) 2003-04-21 2008-09-09 3M Innovative Properties Company Tamper indicating devices and methods for securing information

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841652A (en) * 1986-02-26 1989-06-27 Efuesukei Kabushiki Kaisha Adhesive sheet
DE3813303C1 (fr) * 1988-04-20 1989-07-06 Schreiner Etiketten Und Selbstklebetechnik Gmbh & Co, 8000 Muenchen, De
EP0326303A1 (fr) * 1988-01-27 1989-08-02 Moore Business Forms, Inc. Sécurité pour images produites par systèmes d'impact
WO1997040484A1 (fr) * 1996-04-24 1997-10-30 Minnesota Mining And Manufacturing Company Etiquette de securite comportant un agent diffusant d'identification, et son procede de fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841652A (en) * 1986-02-26 1989-06-27 Efuesukei Kabushiki Kaisha Adhesive sheet
EP0326303A1 (fr) * 1988-01-27 1989-08-02 Moore Business Forms, Inc. Sécurité pour images produites par systèmes d'impact
DE3813303C1 (fr) * 1988-04-20 1989-07-06 Schreiner Etiketten Und Selbstklebetechnik Gmbh & Co, 8000 Muenchen, De
WO1997040484A1 (fr) * 1996-04-24 1997-10-30 Minnesota Mining And Manufacturing Company Etiquette de securite comportant un agent diffusant d'identification, et son procede de fabrication

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000054243A1 (fr) * 1999-03-05 2000-09-14 Daimlerchrysler Ag Feuille adhesive de securite servant d'element d'identification
DE19909723C5 (de) * 1999-03-05 2004-04-15 Daimlerchrysler Ag Sicherheits - Klebefolie als Identifizierungsträger
WO2002035506A1 (fr) * 2000-10-25 2002-05-02 3M Innovative Properties Company Dispositif indicateur de tentative de deterioration
US6416857B1 (en) 2000-10-25 2002-07-09 3M Innovative Properties Company Tamper indicating device
GB2386234B (en) * 2001-10-03 2005-07-27 Willett Int Ltd Coding of substrates
WO2003035411A2 (fr) * 2001-10-25 2003-05-01 Tesa Ag Film de transfert par laser pour etiquetage durable d'elements constitutifs
WO2003035411A3 (fr) * 2001-10-25 2003-10-23 Tesa Ag Film de transfert par laser pour etiquetage durable d'elements constitutifs
US6764803B2 (en) 2001-10-25 2004-07-20 Tesa Ag Laser transfer film for durable inscription on components
WO2004021471A1 (fr) * 2002-08-26 2004-03-11 Schreiner Gmbh & Co. Kg Enveloppe pour piles seches, accumulateurs et elements similaires
US7422781B2 (en) 2003-04-21 2008-09-09 3M Innovative Properties Company Tamper indicating devices and methods for securing information

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